A.5MVA~40MVA B.50kVA~10MVA C.15MVA~40MVA D.50kVA~20MVA
A.直接接地 B.不接地 C.經(jīng)消弧線圈接地 D.經(jīng)低電阻接地
A.1.8~2.0 B.1.9~2.1 C.2.0~2.2 D.1.8~2.2